Publishing Builds
At any time while we are creating our game, we might want to see how it looks when we build and run it outside of the editor as a standalone or web player. I will explain how to access the Build Settings and how to create different builds of your games. *File->Build Settings*... is the menu item to access the Build Settings window. It pops up an editable list of the scenes that will be included when you build your game.

It is easy to add scene files to the list for multi-scene builds. There are two ways to add them. The first way is to click the Add Current button. We will see the currently open scene appear in the list. The second way to add scene files is to drag them from the Project View to the list. We can also add a new Scene by-
Application.LoadLevel()

If we want to remove a scene from the list, click to highlight the scene and press Command-Delete. The scene will disappear from the list and will not be included in the build.

When we are ready to publish your build, select a Platform and make sure that the Unity logo is next to the platform; if its not then click in the Switch Platform button to let Unity know which platform we want to build for. Finally press the Build button. We will be able to select a name and location for the game using a standard Save dialog. When we click Save, Unity builds our game pronto. It's that simple.
Setting up Android Developer environment
We will need to have our Android developer environment set up before we can test our Unity games on the device. This involves downloading and installing the Android SDK with the different Android platforms and adding your physical device to your system (this is done a bit differently depending on whether we are developing on Windows or Mac).

**Android SDK Setup**
There are some steps you must follow before you can build and run any code on your Android device. This is true regardless of whether you use Unity or write Android applications from scratch.

1. **Download the Android SDK**
You can download by the following link:
[http://developer.android.com/sdk/index.html][1]

2. **Install the Android SDK**
SDK should have Android platform with API level equal to or higher than 9 (Platform 2.3 or greater)
>>. Unpack the ZIP file (named adt-bundle-.zip) and save it to an appropriate location, such as a "Development" directory in your home directory.
>>. Open the adt-bundle-/eclipse/ directory and launch eclipse.